Method for modifying the surface of finely divided particles by the application of organofunctional polysiloxanes
First Claim
1. A method for modifying the surface of a particle which comprises applying to the particle, an organosiloxane with ester groups and long-chain alkyl groups linked over carbon atoms to silicon atoms and having the general formula ##STR4## wherein R1 is an alkyl group with 1 to 4 carbon atoms or a phenyl group, with the proviso that at least 90% of the R1 groups are CH3,R2 is selected from the group consisting of R1, R3 and R4 with the proviso that 50 to 99% of the R2 groups have the same meaning as R1 the remaining groups being R3 and R4, whereby each R3 is a group of the formula --(CH2)n --CO--OR5, where R5 is an alkyl group with 1 to 4 carbon atoms and n is a number from 6 to 16, and R4 is a linear or branched alkyl group with 6 to 30 carbon atoms, with the proviso that(a) the ratio of R3 to R4 is within the range of 1:
- 25 to 10;
1,(b) at least one R3 group and at least one R4 group must be present in the average molecule,a is a number from 1 to 500, andb is a number from 0 to 10.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for modifying the surface of finely divided particles, such as pigments and filler or glass fiber, is described. The method utilizes organopolysiloxanes with ester groups and long-chain alkyl groups, which are linked over carbon atoms to silicon atoms.
23 Citations
4 Claims
-
1. A method for modifying the surface of a particle which comprises applying to the particle, an organosiloxane with ester groups and long-chain alkyl groups linked over carbon atoms to silicon atoms and having the general formula ##STR4## wherein R1 is an alkyl group with 1 to 4 carbon atoms or a phenyl group, with the proviso that at least 90% of the R1 groups are CH3,
R2 is selected from the group consisting of R1, R3 and R4 with the proviso that 50 to 99% of the R2 groups have the same meaning as R1 the remaining groups being R3 and R4, whereby each R3 is a group of the formula --(CH2)n --CO--OR5, where R5 is an alkyl group with 1 to 4 carbon atoms and n is a number from 6 to 16, and R4 is a linear or branched alkyl group with 6 to 30 carbon atoms, with the proviso that (a) the ratio of R3 to R4 is within the range of 1: - 25 to 10;
1,(b) at least one R3 group and at least one R4 group must be present in the average molecule, a is a number from 1 to 500, and b is a number from 0 to 10. - View Dependent Claims (2, 3, 4)
- 25 to 10;
Specification
-
- Resources
-
Current AssigneeGoldschmidt AG
-
Original AssigneeTh. Goldschmidt AG (Rag-Stiftung)
-
InventorsSchaefer, Dietmar, Hohner, Werner
-
Primary Examiner(s)DEAN JR, RALPH H
-
Application NumberUS07/984,752Time in Patent Office796 DaysField of Search428/407, 428/391, 428/405, 523/212, 523/214, 427/387US Class Current428/391CPC Class CodesC01P 2006/22 Rheological behaviour as di...C03C 25/40 Organo-silicon compoundsC09C 3/12 Treatment with organosilico...Y10T 428/2962 Silane, silicone or siloxan...Y10T 428/2991 CoatedY10T 428/2995 Silane, siloxane or silicon...Y10T 428/2998 including synthetic resin o...
